put a set of micrometers on a .270 projectile and you will se it IS THE ONLY 7mm those .284 posers are just different lol. the new 6.8mm pills are SLIGHTLY less difference is less than .308 vs .311-312 and some of us quite happily fire .308 pills down a 7.62x39mm bore and get good results.... all reports of fellas using 6.8mm pills in mighty .270 winchester seem to suggest they are just fine n dandy....
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